Toamasina's 2025 population is now estimated at 554,082. In 1950, the population of Toamasina was 33,794. Toamasina has grown by 24,538 in the last year, which represents a 4.63% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects . These estimates represent the Urban agglomeration of Toamasina, which typically includes Toamasina's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Antananarivo | 4,228,980 | 4.45% |
| Antsirabe | 446,060 | 4.44% |